01Geometry and reinforcement
Choose a standard section or define a custom outline, then set the reinforcement layout.
Reinforced concrete sections · iPhone
Biaxial bending, interaction surfaces and diagrams, reinforcement design. ACI 318, AASHTO LRFD, CSA A23.3, CSA S6, AS 3600, NZS 3101.
Geometry, materials, loads, analyses, PDF report.
On-device computation · No account · 7-day trial

Supported codes
Advanced parameters for each code profile.
01 / SETUP
Solid or hollow sections, beams, walls or a custom outline. Define the concrete geometry, reinforcement layout, materials and load cases.
Choose a standard section or define a custom outline, then set the reinforcement layout.
Select a design code, concrete and steel strengths, and adjust the advanced parameters.
Enter axial forces and bending moments, or import several load cases at once.
02 / ANALYSE
Section and load cases are entered once and shared by every analysis.
BIAXIAL BENDING
Rotate the interaction surface, select a load case and inspect its check. Colours distinguish loads within the resistance domain, on its boundary and outside it.

03 / DOCUMENT
Bring project inputs, figures and results together in a PDF report. Choose a concise or detailed presentation, then select the tables and plots to include.



Subscriptions
Every plan includes all analyses and PDF export.
per week
7-day trial
per year
Billed annually.
7-day trial
Equivalent to $0.96/week

Reference prices in US dollars. Local price and currency confirmed by Apple.
Automatically renews. Cancel anytime.
Eurocode 2, SIA 262 or BAEL codes: see SBA
Explore SBA for Eurocode 2, SIA and BAEL. App interface in French.